12/28/2023 0 Comments Physics light diffraction![]() The views expressed in the project do not necessarily reflect the views of The Office for Learning and Teaching. Support for this project website has been provided by The Office for Learning and Teaching, which is part of the Department of Industry, Innovation, Science, Research and Tertiary Education. Single slit diffraction, diffraction gratings.ĭownloads (thumbnails at 50% of size of animation) Sunlight and artificial illumination transmit light waves whose electric field vectors vibrate in all perpendicular planes to the. Recreating a hologram: coherence beam and hologram plate. Diffraction of light occurs when a light wave passes by a corner or through an opening or slit that is physically the approximate size of, or even smaller than, that lights wavelength. X-ray diffraction.įorming a hologram: beam splitter, object and reference beams, interference at the film. Diffraction requires wavelengths less than 0.1 nm. The atomic lattice as a diffraction grating. A diffraction grating with 2.10E3 slits per centimeter is used to measure the wavelengths emitted by hydrogen gas. When is the eye diffraction limited? The resolution of telescopes. Diffraction of Light: Diffraction Grating. Resolving two point sources: Rayleigh's criterion. Diffraction pattern from a circular aperture. Rayleigh criterion and the Airy disc: Aperture and resolutionĬircular apertures in optics. A modern recreation of Arago's experiment. The bright dot at the centre of the shadow: Poisson's argument against the wave nature of light. The hydrogen spectrum and the origins of quantum mechanics. Continuous spectra and line spectra, absorption and emission spectra. Young's experiment with finite slit width: I q shows both interference and diffraction effects.Ī light-hearted discussion to illustrate why we don't notice quantum interference in everyday life.Īdding phasors with 2, 3, 4 and many slits: Diffraction gratings. Young's experiment with finite slits.ĭiffraction from a single slit:Huygens' construction. X-ray, neutron and electron diffractionĭiffraction from a single slit. Shadows and beams with water waves of short wavelength. In this section, we'll show how to mathematically modeling a thin lens.Diffraction, shadows, beams, Huygens' construction.ĭiffraction of light and sound. Modeling a thin lens as a phase transformationįigure 1: Diagram illustrating a thin lens acting as a phase transformation over the input field In this post, we'll assume that the reader already knows the fundamentals of geometric optics and diffraction, and we'll discuss deeper the math involved and the optical imaging system simulation (2:03), which also illustrates the diffraction limited systems, that are quite important in microscopy.įinally, we'll explain how to simulate diffraction patterns using lenses with Python. ![]() It's recommended to read this post before entering on this one. The simulations were done with the angular spectrum method, which was explained in this post. In these simulations we'll compare the diffraction patterns with lenses and without it, experiment with different apertures and locations of the lenses while discussing some of their applications. In the above video, we'll illustrate some of the principles of Fourier optics visually and intuitively by showing how lenses affect the diffraction of light through seven simulations. Most interesting and practical optical instruments use lenses to manipulate the formation of images, so understanding how lenses affect the propagation of light is critical to understand Fourier optics. Diffraction occurs with electromagnetic waves, such as light and radio waves, and also in sound waves and water waves. ![]()
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